A twin-lens projection display includes a dichroic synthesizing prism and an optical path compensating prism. First and second light modulators, which are disposed adjacent to first and second input sides of the dichroic synthesizing prism, provide modulated first and second color components to the same. A third light modulator is disposed adjacent to an input side of the optical path compensating prism, and provides a modulated third color component thereto. A first projection lens receives the first and second color components from an output side of the dichroic synthesizing prism, whereas a second projector lens receives the third color component from an output side of the optical path compensating prism.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A twin-lens projection display, comprising: a color separating mirror set adapted to separate input light into first, second and third color components; a dichroic synthesizing prism having a first input side, a second input side, and an output side; an optical path compensating prism having an input side and an output side; a first light modulator for modulating the first color component from said color separating mirror set, said first light modulator being disposed adjacent to said first input side of said dichroic synthesizing prism, and providing the modulated first color component thereto, said dichroic synthesizing prism outputting the modulated first color component at said output side thereof; a second light modulator for modulating the second color component from said color separating mirror set, said second light modulator being disposed adjacent to said second input side of said dichroic synthesizing prism, and providing the modulated second color component thereto, said dichroic synthesizing prism outputting the modulated second color component at said output side thereof; a third light modulator for modulating the third color component from said color separating mirror set, said third light modulator being disposed adjacent to said input side of said optical path compensating prism, and providing the modulated third color component thereto, said optical path compensating prism outputting the modulated third color component at said output side thereof; a first projection lens disposed adjacent to said output side of said dichroic synthesizing prism so as to receive the modulated first and second color components therefrom; and a second projection lens disposed adjacent to said output side of said optical path compensating prism so as to receive the modulated third color component therefrom.
2. The twin-lens projection display of claim 1 , wherein the first, second and third color components are primary color components.
3. The twin-lens projection display of claim 1 , wherein said color separating mirror set includes first and second dichroic mirrors which cooperate to separate the input light into the first, second and third color components.
4. The twin-lens projection display of claim 1 , wherein said dichroic synthesizing prism and said optical path compensating prism are connected integrally to form a color synthesizing prism.
5. The twin-lens projection display of claim 1 , wherein each of said first, second and third light modulators includes a liquid crystal light valve.
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February 20, 2001
June 11, 2002
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